/****************************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/
/*
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Adam Dunkels <adam@sics.se>
 *
 */
#ifndef __LWIP_ICMP6_H__
#define __LWIP_ICMP6_H__

#include <net/lwip/opt.h>

#if LWIP_ICMP					/* don't build if not configured for use in lwipopts.h */

#include <net/lwip/pbuf.h>
#include <net/lwip/netif.h>

#ifdef __cplusplus
extern "C" {
#endif

#define ICMP6_DUR  1
#define ICMP6_TE   3
#define ICMP6_ECHO 128			/* echo */
#define ICMP6_ER   129			/* echo reply */

enum icmp_dur_type {
	ICMP_DUR_NET = 0,		/* net unreachable */
	ICMP_DUR_HOST = 1,		/* host unreachable */
	ICMP_DUR_PROTO = 2,		/* protocol unreachable */
	ICMP_DUR_PORT = 3,		/* port unreachable */
	ICMP_DUR_FRAG = 4,		/* fragmentation needed and DF set */
	ICMP_DUR_SR = 5			/* source route failed */
};

enum icmp_te_type {
	ICMP_TE_TTL = 0,		/* time to live exceeded in transit */
	ICMP_TE_FRAG = 1		/* fragment reassembly time exceeded */
};

void icmp_input(struct pbuf *p, struct netif *inp);

void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);

struct icmp_echo_hdr {
	u8_t type;
	u8_t icode;
	u16_t chksum;
	u16_t id;
	u16_t seqno;
};

struct icmp_dur_hdr {
	u8_t type;
	u8_t icode;
	u16_t chksum;
	u32_t unused;
};

struct icmp_te_hdr {
	u8_t type;
	u8_t icode;
	u16_t chksum;
	u32_t unused;
};

#ifdef __cplusplus
}
#endif
#endif							/* LWIP_ICMP */
#endif							/* __LWIP_ICMP6_H__ */
